Assessment of drug-induced occult bleeding.
D000328:Adult; D000368:Aged; D001241:Aspirin / Q000009:adverse effects*; D002859:Chromium Isotopes; D004912:Erythrocytes; D005260:Female; D006471:Gastrointestinal Hemorrhage / Q000139:chemically induced*; D006801:Humans; D008297:Male; D008875:Middle Aged; D009780:Occult Blood; D012216:Rheumatic Diseases / Q000188:drug therapy; D012459:Salicylates / Q000009:adverse effects*
D002859:Chromium Isotopes; D012459:Salicylates; D001241:Aspirin